Safety Warnings - DECAWELD 345 Manual De Instrucciones

Instruction Manual
Read this instruction manual carefully before using the welding machine.
The MMA and TIG coated electrode arc welding systems referred to herein as "welding
machines" are for industrial and professional use.
Make sure that the welding machine is installed and repaired only by qualified persons or
experts, in compliance with the law and with the accident prevention regulations.
Make sure that the operator is trained in the use and risks connected to the arc-welding
processs and in the necessary measures of protection and emergency procedures.
Detailed information can be found in the "Installation and use of arc-welding equipment"
brochure: IEC or CLC/TS 62081.
Safety warnings
Make sure that the power socket to which the welding machine is connected is protected

by suitable safety devices (fuses or automatic switch) and that it is grounded.
Make sure that the plug and power cable are in good condition.

Before plugging into the power socket, make sure that the welding machine is switched

off.
Switch the welding machine off and pull the plug out of the power socket as soon as

you have finished working.
Switch the welding machine off and pull the plug out of the power socket before connecting

the welding cables, installing the continuous wire, replacing any parts in the torch or
wire feeder, carrying out maintenance operations, or moving it (use the carrying handle
on the welding machine).
Do not touch any electrified parts with bare skin or wet clothing. Insulate yourself

from the electrode, the piece to be welded and any grounded accessible metal parts.
Use gloves, footwear and clothing designed for this purpose and dry, non-flammable
insulating mats.
Use the welding machine in a dry, ventilated space. Do not expose the welding machine

to rain or direct sunshine.
Use the welding machine only if all panels and guards are in place and mounted

correctly.
Do not use the welding machine if it has been dropped or struck, as it may not be safe.

Have it checked by a qualified person or an expert.
Eliminate any welding fumes through appropriate natural ventilation or using a smoke

exhauster. A systematic approach must be used to assess the limits of exposure
to welding fumes, depending on their composition, concentration and the length of
exposure.
Do not weld materials that have been cleaned with chloride solvents or that have been

near such substances.
Use a welding mask with adiactinic glass suited for welding. Replace the mask if

damaged; it may let in radiation.
Wear fireproof gloves, footwear and clothing to protect the skin from the rays produced

by the welding arc and from sparks. Do not wear greasy garments as a spark could set
fire to them. Use protective screens to protect people nearby.
Do not allow bare skin to come into contact with hot metal parts, such as the torch,

electrode holder grippers, electrode stubs, or freshly welded pieces.
Metal-working gives off sparks and splinters. Wear safety goggles with protective side

eye guards.
Welding sparks can trigger fires.

Do not weld or cut anywhere near inflammable materials, gasses or vapours.

Do not weld or cut containers, cylinders, tanks or piping unless a qualified technician

or expert has checked that it is possible to do so, or has made the appropriate
preparations.
Remove the electrode from the electrode holder gripper when you have completed

the welding operations. Make sure that no part of the electrode holder gripper electric
circuit touches the ground or earth circuits: accidental contact could cause overheating
or trigger a fire.
EMF Electromagnetic Fields
Welding current creates electromagnetic fields (EMF) near the welding circuits and
the welder. Electromagnetic fields may interfere with medical prostheses such as
pacemakers.
Suitable and sufficient measures should be implemented to protect those operators
having such aids. For instance, they should not be allowed to enter that area where
welding equipment is used. Any operator having such aids should consult their doctor
before coming close to an area where welding equipment is used.
This device meets the specific requirements of the product technical standard and is
intended for professional use in an industrial environment only. Compliance to expected
limits for human exposure to electromagnetic fields at home is not ensured.
Follow these strategies to minimise exposure to electromagnetic fields (EMF):
Do not place your body between the welding cables. Both welding cables should be on

the same side of your body.
Twist both welding cables together and secure them with tape when possible.

Do not wrap the welding cables around your body.

Connect the earth cable to the workpiece as close as possible to the area to be

welded.
Keep your head and trunk as far as possible from the welding circuit. Do not work

950622-00 0/02/3
EN
close to the welder, or seated or leaning on it. Minimum distance: Fig. 6 Da = cm 50;
Db = cm.20
Class A equipment
This equipment has been designed to be used in professional and industrial
environments.
If this equipment is used in domestic environments and those directly connected to a
low voltage power supply network which supplies buildings used for domestic purposes,
it may be difficult to ensure compliance to electromagnetic compatibility as the result of
conducted or radiated disturbances.
Welding in conditions of risk
If welding needs to be done in conditions of risk (electric discharges, suffocation, the

presence of inflammable or explosive materials), make sure that an authorised expert
evaluates the conditions beforehand. Make sure that trained people are present who
can intervene in the event of an emergency. Use the protective equipment described in
5.10; A.7; A.9 of the IEC or CLC/TS 62081 technical specification.
If you are required to work in a position raised above ground level, always use a safety

platform.
If more than one welding machine has to be used on the same piece, or in any case on

pieces connected electrically, the sum of the no-load voltages on the electrode holders
or on the torches may exceed the safety levels. Make sure that an authorised expert
evaluates the conditions beforehand to see if such risk exists and adopt the protective
measures described in 5.9 of the IEC or CLC/TS 62081 technical specification if
required.
Additional warnings
Do not use the welding machine for purposes other than those described, for example

to thaw frozen water pipes.
Place the welding machine on a flat stable surface, and make sure that it cannot move.

It must be positioned in such a way as to allow it to be controlled during use but without
the risk of being covered with welding sparks.
Do not work with the welding machine hung from the body, using straps or any other

device.
Do not lift the welding machine. No lifting devices are fitted on the machine.

Do not use cables with damaged insulation or loose connections.

Description of the welding machine
The welding machine is a current transformer for manual arc welding using MMA and TIG
coated electrodes with a torch that strikes the arc on contact.
The welding machine is built using electronic INVERTER technology.
The delivered current is direct.
The electrical characteristic of the transformer is of the falling type.
This manual refers to a range of welding machines that differ in some of their
characteristics.
Identify your model in Fig. 1.
Main parts Fig. 1
Mod.1
A) Power cable
B) ON/OFF switch
D) Welding current adjustment
F) Thermal cutout signal
H) Couplings for welding cables
Mod.2
A) Power cable
B) ON/OFF switch
C) MMA / Cellulosic / TIG selector
D) Welding current adjustment
E) ARC FORCE adjustment
F) Thermal cutout signal
G) Power supply indicator and fault warning light
H) Couplings for welding cables)
Mod.3
A) Power cable
B) ON/OFF switch
D) Welding current adjustment
F) Thermal cutout signal
H) Couplings for welding cables (Some welding machines have directly connected
cables)
J) Power supply indicator
Mod.4
A) Power cable
B) ON/OFF switch
N) MMA / TIG (Hot Start / Arc Force) selector
D1)Welding current / Hot Start / Arc Force, adjustment
F) Thermal cutout signal
G) Power supply indicator and fault warning light
H) Couplings for welding cables
Technical data
A data plate is affixed to the welding machine. Fig. 2 shows an example of this plate.
A) Constructor name and address
B) European reference standard for the construction and safety of welding equipment
C) Symbol of the welding machine internal structure
D) Symbol of the foreseen welding process: D1: MMA welding; D2: TIG welding
E) Symbol of the continuous current delivered
F) Input power required:
˜ alternate single phase voltage, frequency F1: from electrical power supply; F2:
from motor generator
G) Level of protection from solids and liquids
H) Symbol indicating the possibility to use the welding machine in environments
potentially subject to electric discharges
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